Hi alanforde800Maximus,

This question is just a big 'Weighted Average' prompt. Based on how the answer choices are 'spread out' though, you can actually avoid most of the calculations entirely.

We're told that there are 30 customers who each purchased 1 item. The list of items is:
12 coffees ($1.25 each)
3 candy bars ($0.90 each)
Some other products (totaling $15)

We're asked for the average price of these items.

Since there are 30 customers, then there must be 30 total items sold. There are 12 coffees and 3 candy bars, so there must be 15 other items that total $15. Thus, the list becomes...

12 coffees ($1.25 each)
3 candy bars ($0.90 each)
15 other items ($1 each)

The most expensive items are the coffees (at $1.25 each), but all of the other items cost LESS than that, so the average of all the items must be LESS than $1.25. There's only one answer that fits...

Final Answer: A

GMAT assassins aren't born, they're made,
Rich